Dressed in spandex that showcased the results of her post-baby slim down, Hilary Duff headed to a yoga session - or so she thought! - in Beverly Hills on Saturday while her husband Mike Comrie looked after their son Luca.

"Went in 4 a nice little yoga class this am... turns out I got the times backwards and was in a full cardio on burn class called ex-flosion! Oy," she tweeted about her fitness mix-up.

Earlier in the day, the married pair took their baby boy with them to a leisurely lunch, and it's nice to see that the Lizzie Maguire star is still indulging in normal meals even though she's trying to lose those last couple of pounds.